Rhode Island frost dates: Last spring and first autumn frost at every NOAA station, 1991-2020
Across Rhode Island's 11 NOAA stations with frost dates, the median last spring frost (32°F) runs from April 7 in Newport Rose to May 3 in Kingston station; for half of its places it comes after April 11.
- Typical last spring frost
- April 11median of 6 places
- Typical first autumn frost
- October 31median of 6 places
- Earliest last frost
- April 7Newport Rose
- Latest last frost
- May 3Kingston station
When is the last frost in Rhode Island, town by town?
Each date is NOAA's: "after April 11 in half of years" means the last 32°F night of spring came after April 11 in half of the years 1991-2020. By the 1-in-10 date, the last frost has passed in nine years out of ten.
Find your town in the list, or look up a ZIP code for the stations nearest it.
| Place or station | Last frost (median) | 1 in 10 after | First frost (median) | 1 in 10 before | Growing season | Zone |
|---|---|---|---|---|---|---|
| Newport Rose | April 7 | April 21 | November 13 | October 31 | 216 days | – |
| NewportNewport State Airport | April 11 | April 24 | November 4 | October 22 | 206 days | 7a |
| ProvidenceRhode Island T.f. Green International Airport | April 11 | April 23 | October 30 | October 16 | 199 days | 7a |
| Tiverton | April 11 | April 22 | November 2 | October 20 | 203 days | 7a |
| WesterlyWesterly State Airport | April 11 | April 26 | October 31 | October 16 | 201 days | 7a |
| Coventry 2 | April 22 | May 4 | October 20 | October 5 | 179 days | – |
| Woonsocket | April 22 | May 6 | October 19 | October 5 | 179 days | 6b |
| North Foster (1 mi E) | April 25 | May 9 | October 19 | October 4 | 176 days | 6b |
| Kingston (1 mi NW) | April 27 | May 11 | October 15 | October 2 | 171 days | 6b |
| Kingston1 mi W | May 1 | May 18 | October 12 | October 1 | 163 days | – |
| Kingston station | May 3 | May 16 | October 8 | September 30 | 159 days | – |
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities, growing-season length); station daily lows via ACIS (zone). Growing season: NOAA's median number of days between the last spring and first autumn 32°F night. Zone: the USDA's plant hardiness rule applied to the station's own 1991-2020 coldest nights.